https://data.worldbank.org/indicator/MS.MIL.XPND.CD?end=2021... - Military spending in current USD
https://data.worldbank.org/indicator/MS.MIL.XPND.GD.ZS?end=2... - Military spending as percent of GDP
Trudeau has been the Canadian PM since 2015 (end of year) and other, than 2016 and 2019, military spending has gone up every year. Over his time as PM there has been a net increase in military spending. The biggest jump was $4.5 billion in 2017, from $17.74 billion to $22.27 billion.
It's interesting to see claims targeting a particular politician show up that are so easily shown to be false. What's the point?
(I personally don't think we should spend anything but the bare minimum in defense here in Canada, since we obviously depend on our neighbors anyways. But that's the argument for saying that Trudeau neglected the armed forces, as far as I understand it).